Solve by substitution and check.x + y = 9 y = 2x + 3
A. (7, 2)
B. (2, 7)
C. (3, 6)
D. (1, 9)
Answer: B
Mathematics
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Simplify the algebraic expression by combining like terms.-6x3 - 7x3
A. -13x9 B. -13x6 C. -14x3 D. -13x3
Mathematics
Use the discriminant to determine the number of real solutions.x2 + 10x + 25 = 0
A. No real solutions B. Two real solutions C. One real solution
Mathematics
Find the exact value. Do not use a calculator.sin 2?
A. 0
B. 
C. 1
D. undefined
Mathematics
Graph the given absolute value function and state its domain and range.f(x) = 
- 4
A. Domain: [- 3, ?)
Range: [-4, ?)
B. Domain: (-?, ?)
Range: [-4, ?)
C. Domain: [3, ?)
Range: (-?, ?)
D. Domain: (-?, ?)
Range: [-4, ?)
Mathematics